Create Water - Rivers Do Not Touch the Ocean Uniformly

[HYLK]

Glad to hear you’ve figured it out yourself. In this thread, someone experienced a similar problem, and it comes down to:

@HYLK

The Coast Erosion device will create a water body based on the terrain it gets fed from the Erosion device. It changes this to create some beaches and then you have your output with a water body “linked to it”. However, when you add a River Device, it will affect the terrain, and also the terrain at the beaches sadly, destroying that “link” between the Coast Erosion’s water body and the (now changed) terrain.

For the full answer, you can take a look at the thread.